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...ll not being able to use >64 processors all at the same time even if detectCores() returns the right count now. I'd appreciate your thoughts on this. Best, Arun. -----Original Message----- From: Tomas Kalibera <tomas.kalibera at gmail.com> Sent: 27 August 2018 19:43 To: Srinivasan, Arunkumar <Arunkumar.Srinivasan at uk.mlp.com>; r-devel at r-project.org Subject: Re: [Rd] Get Logical processor count correctly whether NUMA is enabled or disabled Dear Arun, thank you for checking the workaround scripts. I've modified detectCores() to use GetLogicalProcessorInformationEx. It i...

...re though if this is entirely relevant since we would be forking new processes in R instead of allowing a single process to use all cores. Apologies if this is utterly irrelevant. Thank you, Arun. From: Tomas Kalibera <tomas.kalibera at gmail.com> Sent: 21 August 2018 11:50 To: Srinivasan, Arunkumar <Arunkumar.Srinivasan at uk.mlp.com>; r-devel at r-project.org Subject: Re: [Rd] Get Logical processor count correctly whether NUMA is enabled or disabled Dear Arun, thank you for the report. I agree with the analysis, detectCores() will only report logical processors in the NUMA group in w...

...).*", "\\1", grep("[0-9]+[ \t]*", out, value=TRUE)))) The remaining problem with running using >64 processors on Windows turned out to be due to a bug in sockets communication, debugged and fixed in R-devel by Luke Tierney. Tomas On 08/29/2018 12:42 PM, Srinivasan, Arunkumar wrote: > Dear Tomas, thank you very much. I installed r-devel r75201 and tested. > > The machine with 88 cores has NUMA disabled. It therefore has 2 processor groups with 64 and 24 processors each. > > require(parallel) > detectCores() > # [1] 88 > > This is great! > &...

...;t have a machine to test this on, but I would hope that snow clusters (e.g. PSOCK) should work fine on systems with >64 logical processors as they spawn new processes (not just threads). Note that FORK clusters are not supported on Windows. Thanks Tomas On 08/21/2018 02:53 PM, Srinivasan, Arunkumar wrote: > Dear Tomas, thank you for looking into this. Here's the output: > > # number of logical processors - what detectCores() should return > out <- system("wmic cpu get numberoflogicalprocessors", intern=TRUE) > [1] "NumberOfLogicalProcessors \r" &quot...

hi everybody, i am new to rails.. plz clear my doubt... this is my question In my table(public_topics), i have 11 rows of data.. whenever i run the following view, it shows the entire rows in the current page.. and i have set the '':per_page'' option to ''2''.so it must show two data per page..but it shows all the rows in a single page..and this case continue

Dear R-devel list, R's detectCores() function internally calls "ncpus" function to get the total number of logical processors. However, this doesnot seem to take NUMA into account on Windows machines. On a machine having 48 processors (24 cores) in total and windows server 2012 installed, if NUMA is enabled and has 2 nodes (node 0 and node 1 each having 24 CPUs), then R's

Have a look at the following, taken from base::rank: ... if (!is.na(na.last) && any(nas)) { yy <- integer(length(x)) # <~~~~~~~~~ storage.mode(yy) <- storage.mode(y) # <~~~~~~~~ yy <- NA NAkeep <- (na.last == "keep") if (NAkeep || na.last) { yy[!nas] <- y if (!NAkeep) yy[nas]

Dear R-devel, I have tested the code below on R v3.3.2 and v3.3.3 on Mac and Windows. x <- c("2017-01-01 05:00:02", "2017-01-02 03 :M:00") # note the ? :M? in 2nd value as.POSIXct(x) # [1] "2017-01-01 GMT" "2017-01-02 GMT? The time info is lost on the first index as well. And it happens *silently*. On the other hand, if I do: lapply(x, as.POSIXct) #?[[1]]

...out the functioning of the R software. I had installed. I tried testing some of the programs and functions. I read in the manual that plot(x,y) functions automatically generates a graphical window and plot. that does not happens in my installation. Please help me in this regard yours sincerely. Arunkumar

Hi to this Group! I am new to Ruby! I am facing problrm s to find the database functions. I want the source of sites for predifiend functions for handling the database. I develpong the shoping cart application, In that i am facing problems to delete the perticuller item form cart . I got idea to delete the total cart information using sesiions I want to delete the perticuller item form

hi all, Am new to R. I am having problems installing Bioconductor package in R on fedora core 4 running on AMD64 bit machine. this is the error message I get : gcc -shared -L/usr/local/lib -o affyPLM.so avg_log.o biweight.o chipbackground.o common_types.o do_PLMrlm.o do_PLMrma.o do_PLMthreestep.o idealmismatch.o LESN.o lm.o lm_threestep.o log_avg.o matrix_functions.o

Hello, Following Dirk's post here: https://github.com/Rdatatable/data.table/issues/1619 we would like to clarify if this is the right behaviour, and if so, the rationale behind it. Here's the summary (thanks to Dirk and Joshua): Sys.setenv("TZ"="America/Chicago") dates = as.Date("2016-03-02") + (0:3)*7 # four Wednesdays # [1] "2016-03-02"

Bumping this up to the front again ... because it exhibits a difference in behaviour of R across OSs. Such a 'feature' may not be desirable. On 4 April 2016 at 18:00, Arunkumar Srinivasan wrote: | Hello, | | Following Dirk's post here: https://github.com/Rdatatable/data.table/issues/1619 | we would like to clarify if this is the right behaviour, and if so, | the rationale behind it. | | Here's the summary (thanks to Dirk and Joshua): | | Sys.setenv("TZ&quo...

...ot;, intern=TRUE) sum(as.numeric(gsub("([0-9]+).*", "\\1", grep("[0-9]+[ \t]*", out, value=TRUE)))) # number of physical processors - as a sanity check system("wmic computersystem get numberofprocessors") Thanks, Tomas On 08/17/2018 05:11 PM, Srinivasan, Arunkumar wrote: > Dear R-devel list, > > R's detectCores() function internally calls "ncpus" function to get the total number of logical processors. However, this doesnot seem to take NUMA into account on Windows machines. > > On a machine having 48 processors (24 cores) in tota...

...es its output to become compatible with format.POSIXct(). * On Windows, detectCores() in package parallel now detects processors in all processor groups, not just the group R is running in (impacts particularly systems with more than 64 logical processors). Reported by Arunkumar Srinivasan. * On Windows, socketSelect() would hang with more than 64 sockets, and hence parallel::clusterApplyLB() would hang with more than 64 workers. Reported by Arunkumar Srinivasan. * as(1L, "double") now does coerce (PR#17457). * lm.influence(), influenc...

...es its output to become compatible with format.POSIXct(). * On Windows, detectCores() in package parallel now detects processors in all processor groups, not just the group R is running in (impacts particularly systems with more than 64 logical processors). Reported by Arunkumar Srinivasan. * On Windows, socketSelect() would hang with more than 64 sockets, and hence parallel::clusterApplyLB() would hang with more than 64 workers. Reported by Arunkumar Srinivasan. * as(1L, "double") now does coerce (PR#17457). * lm.influence(), influenc...

...es its output to become compatible with format.POSIXct(). * On Windows, detectCores() in package parallel now detects processors in all processor groups, not just the group R is running in (impacts particularly systems with more than 64 logical processors). Reported by Arunkumar Srinivasan. * On Windows, socketSelect() would hang with more than 64 sockets, and hence parallel::clusterApplyLB() would hang with more than 64 workers. Reported by Arunkumar Srinivasan. * as(1L, "double") now does coerce (PR#17457). * lm.influence(), influenc...

Hi, After installing the rubygems 1.3.1, I face the following issues while installing new gems. Error: arun@mysystem:~/Desktop$ sudo gem install ip2country-0.0.2.gem ERROR: While executing gem ... (Zlib::GzipFile::Error) not in gzip format My Environment: OS - ubuntu 8.04 - the Hardy Heron version. Ruby - ruby 1.8.6 (2007-09-24 patchlevel 111) [i486-linux] RubyGems Environment:

hi , Compiled and installed samba 3.0.2a as PDC in sun solaris 2.9, for supporting win xp machines. Working on the Kerberos support, would like to whether the Sun solaris version of kerberos is compatible with samba 3.0.2a. Thanx in advance aarumuga __________________________________ Do you Yahoo!? Get better spam protection with Yahoo! Mail. http://antispam.yahoo.com/tools